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Eudialyte & Sérandite

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LMB169826

Eudialyte & Sérandite

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Description Tabs

Description
Locality: 
Demix-Varennes Quarry, Varennes & St-Amable, Montérégie, Québec, Canada
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 4.2 × 2.5 cm
Description

This is a micro. The group of tabular pink eudialyte xls in the foreground spans 3 mm. You will need 10-20X to view the xls. The color of eudialyte in the sill ranges from yellow/orange to “shocking” pink. But it is apparently all eudialyte proper. No other member of the group has been confirmed from here so far. Eudialyte in the sill is generally well formed, thick tabular in habit (as here), but very brittle due to internal flaws. This is a good sized aggregate of undamaged, lustrous, xls. The white prisms on the left are sérandite. White sérandite may seem strange, but it is well known from here. (Pectolite is exceedingly rare.) Weight 1.3 oz. Single item shipping weight 3.5 oz. Up to 4 oz, one or two small items can be combined for the same postage.

Mineral Data
What's on the rock

Eudialyte

Formula: 
Na15Ca6(Fe2+,Mn2+)3Zr3[Si25O73](O,OH,H2O)3(OH,Cl)2
Strunz: 
9.CO.10
Hardness: 
5.0 - 6.0
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland

Sérandite

Formula: 
Na(Mn2+,Ca)2(HSi3O9)
Strunz: 
9.DG.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea
LMB minerals

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

In addition to the standard terms and conditions, please note the following. Almost all IDs are visual. While in most cases the ID is obvious, there may be cases where it is not. If you are doubtful about a particular ID, please ask for more information. Or do not bid! Similarly, if you are not sure that the specimen meets your criteria, do not bid. I have tdone the best I can with the photos. Nevertheless, if you are not happy with a specimen for any reason, I will refund the bid price – but not the shipping costs (unless the fault is clearly mine) – if the specimen is returned. This policy applies even if analysis of the specimen shows that my ID was incorrect. When in doubt, ask - or don’t bid. Note that most crystals at MSH and Varennes are micros - even if on large specimens. Please pay attention to the stated sizes. Any customs duties, fees etc. are the responsibility of the buyer.

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